CVE-2026-5813Public exploitNetwork attack vector

Unauthenticated SQL injection via unsanitized cid parameter

Published Apr 8, 2026 · Updated Apr 8, 2026

SQL injection in PHPGurukul Online Course Registration 3.1 allows remote attackers to manipulate its database through the cid parameter. The public /check_availability.php endpoint places POST-supplied cid input directly into SQL queries without sanitization or validation. No login or user interaction is required; demonstrated boolean- and time-based blind queries allow database reads or writes within the application's database permissions.

CVSS severityUnavailable
Unscored
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in PHPGurukul Online Course Registration 3.1 allows remote attackers to manipulate its database through the cid parameter. The public /check_availability.php endpoint places POST-supplied cid input directly into SQL queries without sanitization or validation. No login or user interaction is required; demonstrated boolean- and time-based blind queries allow database reads or writes within the application's database permissions.

The record

CVE
CVE-2026-5813
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
jaychouchannel
Product
Online Course Registration
Classifications
CWE-74, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

jaychouchannel · Online Course Registrationversion=3.1

Published CVSS scores

5.5GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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